For those with the new Surface Book with Performance Base there is also a driver update for the GTX 965M as well as the UEFI Firmware.

As always, open the Start Menu, and type "Check for Updates" to instantly access Windows Update to see if these new drivers are available. You will be asked to perform a restart when they have finished installing.

While this is little more than a Seems Faster™ update, it's always encouraging to see driver updates hitting Microsoft's Surface line. If you notice any significant changes as a result of these new drivers, let us know in the comments.

Very Good, I wish I could get mic drivers for my mic. It always stop working until I disenable then and enable them, it wouldn't work and them are up to date. When I turn off and back on, the the problem still come up and until I do the same process again. Pls any help on this?

I just got a new SB and my mic did not work out of the box. It also bluescreened while setting up Windows Hello, so perhaps other things were going on, but I returned it for a different model. I have yet to have issues with my mic since then.

The nvidia driver via Windows Update is almost NEVER as new as the ones from GeForce Experience. You likely have a newer driver than the one being pushed via Windows Update.

My i5/256/dGPU Surface Book installed these updates overnight without incident. I did have to use my PIN to login this morning, though, because as happens many times with these firmware updates, Windows Hello just won't work on the first login afterwards. Works fine after that.

With the Surface Book with Performance Base (i7/16/512), I had a slew of issues with manually installing Nvidia Drivers.
A major difference between the Microsoft Update driver and the Nvidia driver is that the Nvidia Control Panel is missing most options. The Nvidia Control Panel installed by Microsoft Update only has "3D Settings/Manage 3D Settings" and you can't even configure individual effects in program settings.
After manually installing the latest Nvidia driver, Nvidia Control Panel regains most functionality, but the computer just gets plain wacky: sometimes it doesn't detect the GPU, some games perform worse (Metal Gear Solid Ground Zeroes always remained at 38fps despite what graphics settings used), and general performance was slower.
I'm not sure if anyone else has the same experience, but I'm playing it safe and sticking with the older Microsoft Update Nvidia driver.

I installed these updates at lunchtime and this afternoon the battery consumption was significantly reduced. I hope it's permanent. Windows was saying I had over 16 hours of battery life, and that's with a 2015 surface book!